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lisabon 2012 [21]
3 years ago
5

Four multiple choice science questions.

Physics
2 answers:
mixas84 [53]3 years ago
7 0
A
c
a
c
just from memory hope this helps

Sati [7]3 years ago
4 0
1. Jupiter (being the largest planet and all)
2. Ice and Rock
3. None of the above
4. Uranus
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What is the base number for the metric system of units? In other words, by what number do we multiply to move up in scale ? ____
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Answer:

10

Explanation:

Each time you want to move up the scale, the number is multiplied by 10. The opposite is true when moving down; you must divide by 10.

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Which property of the wave makes it-(C)
AlekseyPX

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low amplitude hope it will help you

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If a 100 N net force act on a 50-kg car, what will the acceleration be
inna [77]
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2 years ago
A 20.0-N weight slides down a rough inclined plane which makes an angle of 30 degree with the horizontal. The weight starts from
Ulleksa [173]

Answer:

1270.64\ \text{J}

Explanation:

m = Mass of object = \dfrac{mg}{g}

mg = Weight of object = 20 N

g = Acceleration due to gravity = 9.81\ \text{m/s}^2

v = Final velocity = 15 m/s

u = Initial velocity = 0

d = Distance moved by the object = 150 m

\theta = Angle of slope = 30^{\circ}

f = Force of friction

fd = Work done against friction

The force balance of the system is

\dfrac{1}{2}m(v^2-u^2)=(mg\sin\theta-f)d\\\Rightarrow \dfrac{1}{2}mv^2=mg\sin\theta d-fd\\\Rightarrow fd=mg\sin\theta d-\dfrac{1}{2}mv^2\\\Rightarrow fd=20\times \sin 30^{\circ}\times 150-\dfrac{1}{2}\times \dfrac{20}{9.81}\times 15^2\\\Rightarrow fd=1270.64\ \text{J}

The work done against friction is 1270.64\ \text{J}.

8 0
3 years ago
At which moon position would a person on Earth see the entire half of the moon(full-moon)?
jeka94
Sun-earth-moon in a straight line. Earth in the 'middle'.
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3 years ago
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